AFK157M25F24B-F Equivalent & Substitute Parts

Part Overview

The AFK157M25F24B-F is a 150 µF, 25 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a surface mount radial can package. This component is designed for automotive, bypass, and decoupling applications with AEC-Q200 qualification. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers to maintain design continuity and supply chain reliability.

Substiute Parts

AFK157M25F24B-F

Cornell Dubilier Electronics (CDE)In Stock: 1131AFK157M25F24B-F Datasheet

Current PartRFQ

EEE-FK1E151AP

Panasonic Electronic ComponentsIn Stock: 17648EEE-FK1E151AP Datasheet

DirectRFQ

EEE-FK1E151P

Panasonic Electronic ComponentsIn Stock: 1534EEE-FK1E151P Datasheet

DirectRFQ

UCL1E151MNL1GS

NichiconIn Stock: 1692UCL1E151MNL1GS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AFK157M25F24B-F is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Capacitance: 150 µF (exact match required)
• Voltage Rating: 25 V (exact match required)
• Tolerance: ±20% (exact match required)
• Operating Temperature Range: -55°C to 105°C (minimum requirement)
• Lifetime: 2000 Hrs @ 105°C (minimum requirement)
• Package Type: Radial, Can - SMD (exact match required)
• Physical Dimensions: 0.315" Dia (8.00mm), Height 0.413" (10.50mm) maximum (exact match required)
• Mounting Type: Surface Mount (exact match required)
• RoHS Compliance: ROHS3 Compliant (required for automotive applications)
• Moisture Sensitivity: MSL 1 (required for unlimited shelf life)

Secondary Compatibility Parameters:

• Ripple Current @ 100 kHz: 600 mA (minimum acceptable)
• ESR @ 100 kHz: 160 mOhm (reference value; lower values acceptable)
• AEC-Q200 Qualification: Required for automotive applications

All substitute parts listed meet or exceed these criteria within the specified tolerances.

Parameter Comparison

Engineering Selection Recommendations

EEE-FK1E151AP (Panasonic Electronic Components)

This substitute is qualified for automotive and high-temperature reflow applications with AEC-Q200 certification. The part is currently in active production with substantial inventory availability (17,580 pcs). Physical dimensions and electrical specifications match the original part exactly. The surface mount land size differs slightly (8.30mm x 8.30mm versus 8.30mm x 10.00mm), which requires PCB layout verification but does not affect electrical performance. This part is suitable for direct replacement in automotive bypass and decoupling circuits.

EEE-FK1E151P (Panasonic Electronic Components)

This substitute carries AEC-Q200 qualification for automotive applications and is in active production (1,431 pcs available). Electrical specifications and physical dimensions are equivalent to the original part. The ripple current at 120 Hz matches the original specification (450 mA). Surface mount land size differs from the original, requiring PCB layout confirmation. This part is suitable for automotive applications requiring equivalent electrical performance.

UCL1E151MNL1GS (Nichicon)

This substitute meets all primary equivalence criteria with superior electrical performance characteristics. The ESR is 80 mOhm (50% lower than the original 160 mOhm), and ripple current at 100 kHz is 850 mA (42% higher than the original 600 mA). The seated height is 0.394" (10.00mm), which is 0.019" lower than the original maximum. The part is in active production (1,591 pcs available) with ROHS3 compliance and MSL 1 rating. AEC-Q200 qualification is not specified for this part. This substitute is suitable for general-purpose applications where automotive qualification is not required.

Frequently Asked Questions (FAQ)

Q: Can EEE-FK1E151AP be used as a direct replacement for AFK157M25F24B-F?

A: Yes. Both parts have identical capacitance (150 µF), voltage rating (25 V), tolerance (±20%), operating temperature range (-55 to 105°C), and lifetime specification (2000 Hrs @ 105°C). Both are AEC-Q200 qualified for automotive applications. The surface mount land size differs slightly, requiring PCB layout verification before implementation.

Q: What is the difference between EEE-FK1E151AP and EEE-FK1E151P?

A: Both parts are Panasonic FK series capacitors with identical electrical specifications and physical dimensions. EEE-FK1E151AP is qualified for high-temperature reflow applications, while EEE-FK1E151P is qualified for general automotive applications. The ripple current at 120 Hz differs: EEE-FK1E151AP provides 390 mA, while EEE-FK1E151P provides 450 mA (matching the original part).

Q: Is UCL1E151MNL1GS suitable for automotive applications?

A: The UCL1E151MNL1GS meets all electrical and physical equivalence criteria. However, AEC-Q200 automotive qualification is not specified for this part. Use of this substitute in automotive applications requires design review and qualification assessment based on specific application requirements.

Q: What is the impact of the different surface mount land sizes?

A: The original AFK157M25F24B-F specifies a land size of 0.327" L x 0.394" W (8.30mm x 10.00mm). The Panasonic substitutes (EEE-FK1E151AP and EEE-FK1E151P) and Nichicon substitute (UCL1E151MNL1GS) specify 0.327" L x 0.327" W (8.30mm x 8.30mm). This difference requires PCB layout verification to confirm pad compatibility and solder joint integrity. Consult PCB design guidelines and component datasheets for specific land pattern requirements.

Q: Does the lower ESR of UCL1E151MNL1GS affect circuit performance?

A: The UCL1E151MNL1GS has an ESR of 80 mOhm compared to the original 160 mOhm. Lower ESR reduces impedance and heat generation, which is generally beneficial in bypass and decoupling applications. However, circuit-specific analysis is required to confirm that lower ESR does not introduce unintended effects such as oscillation or stability issues in feedback-controlled systems.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. EEE-FK1E151AP, EEE-FK1E151P, and UCL1E151MNL1GS are all available in Tape & Reel (TR) packaging, suitable for automated assembly processes. The original AFK157M25F24B-F packaging specification is not provided in the available data.

Q: What is the maximum seated height difference among the substitutes?

A: The original AFK157M25F24B-F and both Panasonic substitutes have a maximum seated height of 0.413" (10.50mm). The Nichicon UCL1E151MNL1GS has a maximum seated height of 0.394" (10.00mm), which is 0.019" lower. This difference must be verified against PCB clearance requirements and component placement constraints.